any avid shorty, but use the tektro 1246A yoke, which is the same yoke that comes with the CR720.
barrel adjusting straddle wire -allows compensation for pad wear w/o raising straddle wire height
I've never seen such a device before. The yoke needs to remain in the same position, otherwise the arms won't return an equal distance, and that's why at least one side of the straddle cable has a fixed length.
Imagine all the features of the tektro cr720, but in a medium instead of wide profile, so it has better mechanical advantage
if I remember correctly, wide profile has more mechanical advantage compared to medium profile